CN216321120U

CN216321120U - Organic waste gas catalytic degradation device

Info

Publication number: CN216321120U
Application number: CN202123007393.3U
Authority: CN
Inventors: 李智; 段锋; 张厚喆; 杨守猛; 李金港
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-04-19
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a catalytic degradation device for organic waste gas, and belongs to the field of waste gas purification. The ultraviolet lamp comprises a box body, a base plate, a filtering sleeve, an ultraviolet lamp tube and an infrared lamp tube; the two sides of the box body are respectively provided with an air inlet end and an air outlet end, the substrate is arranged on one side of the box body close to the air inlet end, and the filtering sleeve, the ultraviolet lamp tube and the infrared lamp tube are fixedly arranged on the substrate; the wall surface of the filtering sleeve is covered with a catalyst and is provided with filtering holes for the exhaust gas to pass through. The utility model can complete the catalytic degradation of organic waste, simultaneously avoid the accumulation of intermediate products on the surface of the catalyst, and effectively improve the catalytic efficiency of the device.

Description

Organic waste gas catalytic degradation device

Technical Field

The utility model belongs to the field of waste gas purification, and particularly relates to a catalytic degradation device for organic waste gas.

Background

With the rapid development of the economic level of China, the consumption of energy is gradually increased, which leads to the generation of a large amount of volatile organic pollutants in the industrial production and daily life processes, such as petroleum, chemical engineering, coating, printing, shoe manufacturing, wood industry, traffic, indoor decoration and other activities. At present, zeolite rotary wheel adsorption concentration, catalytic combustion, activated carbon adsorption concentration, catalytic oxidation and low-temperature plasma technology are mainly utilized in the domestic treatment of large-flow and low-concentration organic waste gas. The first two technologies, while highly efficient, have high initial investment and maintenance costs, which are unacceptable to small businesses in general. The low-temperature plasma technology has the problems of operation danger, low efficiency and the like, so that the low-temperature plasma technology cannot be widely applied.

Therefore, it is of great significance to research and develop a low-concentration organic waste gas purification treatment device which is continuous, efficient and low in investment and maintenance cost.

The Chinese patent application numbers are: CN201420397256.6, published date: 2014 12 months 10 days' patent literature discloses a portable photocatalysis air purifier, is provided with the clarifier shell body on the automobile body, and the clarifier shell body is cuboid clarifier shell body, has set gradually fan, ultraviolet lamp and photocatalyst filter screen from left to right in the clarifier shell body, the ultraviolet lamp passes through the fixing base and links to each other with the clarifier shell body, has seted up the air intake on the both sides wall of clarifier shell body right-hand member, and the exhaust vent has been seted up to the top left end of clarifier shell body, the automobile body outside is provided with annular bumper.

The Chinese patent application numbers are: CN201921131815.8, published date: patent document No. 4/17/2020 discloses a photo-oxidative catalytic exhaust gas treatment tower comprising: the tower body the lower extreme one side of tower body is provided with the waste gas import the upper end of tower body is provided with the clean air export be provided with the ozone filter layer in the tower body of waste gas import upper end be provided with a plurality of light oxygen catalytic unit in the tower body of ozone filter layer upper end, light oxygen catalytic unit's structure includes: a plurality of rows of light oxygen catalysis lighting unit of evenly distributed and set up the photocatalyst catalyst layer between two adjacent rows of light oxygen catalysis lighting unit respectively, light oxygen catalysis lighting unit's structure includes: the tower comprises a tower body, a plurality of large glass reinforced plastic pipes uniformly arranged in the tower body, small glass reinforced plastic pipes symmetrically arranged on two sides of the large glass reinforced plastic pipes, and one ends of the large glass reinforced plastic pipes and one ends of the small glass reinforced plastic pipes are respectively sealed in the tower body.

The two schemes are exhaust gas purification devices, and both are used in combination of adsorption and photocatalysis, but in the adsorption and catalytic degradation processes of organic exhaust gas, macromolecular organic matters can generate a part of intermediate products with higher melting points while being oxidized and degraded, and the part of intermediate products are difficult to be degraded by the irradiation of a catalyst and an ultraviolet lamp, are easy to accumulate on the surface of the catalyst of a filter screen or a filter layer, so that the catalyst is inactivated, and the exhaust gas purification effect of the device is reduced. Therefore, the filter screen or the filter layer needs to be replaced frequently, on one hand, the replacement needs time, the catalytic efficiency is affected, and on the other hand, the maintenance cost of the device is increased.

Disclosure of Invention

1. Problems to be solved

Aiming at the problem that when the existing waste gas purification device carries out catalytic degradation on organic waste gas, intermediate products are easy to accumulate on the surface of a catalyst to cause inactivation of the catalyst, the utility model provides the catalytic degradation device for the organic waste gas, which can complete catalytic degradation on the organic waste, simultaneously avoid the accumulation of the intermediate products on the surface of the catalyst and effectively improve the catalytic efficiency of the device.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A catalytic degradation device for organic waste gas comprises a box body, a base plate, a filtering sleeve, an ultraviolet lamp tube and an infrared lamp tube; the two sides of the box body are respectively provided with an air inlet end and an air outlet end, the substrate is arranged on one side of the box body close to the air inlet end, and the filtering sleeve, the ultraviolet lamp tube and the infrared lamp tube are fixedly arranged on the substrate; the wall surface of the filtering sleeve is covered with a catalyst and is provided with filtering holes for the exhaust gas to pass through.

As a further improvement of the technical scheme, the base plate is provided with mounting holes for mounting the filtering sleeve, the ultraviolet lamp tube and the infrared lamp tube respectively, and the end parts of the base plate, the filtering sleeve, the ultraviolet lamp tube and the infrared lamp tube are fixedly connected with the mounting holes.

As the further improvement of the technical scheme, the filtering sleeve comprises a supporting framework and an adsorption filter screen, the supporting framework is fixedly installed on the base plate, and the adsorption filter screen is arranged on the supporting framework and covered with the catalyst on the surface.

As a further improvement of the technical scheme, the device also comprises a fixing frame; the fixing frame is fixedly installed on one side, close to the air outlet end, of the box body, and one end, close to the fixing frame, of the infrared lamp tube is installed on the fixing frame.

As a further improvement of the technical scheme, the fixing frame is provided with a groove for the end part of the infrared lamp tube to extend into.

As a further improvement of the technical scheme, the air inlet end is gradually reduced along the direction from the box body to the air inlet.

As a further improvement of the technical scheme, the diameter of the air outlet end along the direction from the box body to the air outlet is gradually reduced.

As a further improvement of the technical scheme, the filtering sleeve, the ultraviolet lamp tube and the infrared lamp tube are all provided with a plurality of filtering sleeves and are arranged on the substrate in a crossed mode.

As a further improvement of the technical scheme, the outer sides of the ultraviolet lamp tube and the infrared lamp tube are covered with protective sleeves.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) the utility model relates to a catalytic degradation device for organic waste gas, which is characterized in that a filtering sleeve, an ultraviolet lamp tube and an infrared lamp tube are arranged on a substrate in a box body, waste gas passes through the filtering sleeve from an air inlet end and then is discharged from an air outlet end, and the waste gas isThe organic molecules are adsorbed to the surface of the filtering sleeve, and the ultraviolet light of the ultraviolet lamp tube decomposes the water molecules in the waste gas to form hydroxyl radicals with strong oxidizing property on one hand, and the hydroxyl radicals are utilized to degrade the organic molecules into H₂O and CO₂On the other hand, ultraviolet light is irradiated to the surface of the catalyst to accelerate H₂Organic molecules can be directly oxidized on the surface of the catalyst while O is decomposed, the ray irradiation temperature of the infrared lamp tube can reach more than 120 ℃, intermediate products with higher melting points accumulated on the surface of the filtering sleeve can be volatilized, the phenomena that the catalyst on the surface of the filtering sleeve is inactivated and the filtering holes are blocked due to accumulation of the intermediate products are avoided, particularly, the upper end of the box body is sealed by arranging the substrate, so that waste gas entering from the air inlet end must enter the box body from the filtering sleeve, and the purification effect of the waste gas is effectively improved;

(2) according to the catalytic degradation device for organic waste gas, the weight of the infrared lamp tube is generally heavier, and the infrared lamp tube can be supported by arranging the fixing frame, so that the looseness of the connection part of the infrared lamp tube and the substrate is prevented, and the stability of the installation structure of the device is ensured;

(3) according to the catalytic degradation device for the organic waste gas, the gas inlet end and the gas outlet end are of the necking structures, so that the flowability of the waste gas in the device is increased;

(4) according to the catalytic degradation device for organic waste gas, the protective sleeves are covered on the outer sides of the ultraviolet lamp tube and the infrared lamp tube, so that the service lives of the ultraviolet lamp tube and the infrared lamp tube can be prolonged.

Drawings

FIG. 1 is a schematic external view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the installation structure of the infrared lamp and the fixing frame;

FIG. 4 is a cross-sectional view of a filter cartridge;

in the figure: 1. a box body; 2. an air inlet end; 3. an air outlet end; 4. a substrate; 41. a filter sleeve mounting hole; 42. an ultraviolet lamp tube mounting hole; 43. an infrared lamp tube mounting hole; 5. a filter cartridge; 51. a support framework; 52. adsorbing a filter screen; 6. an ultraviolet lamp tube; 7. an infrared lamp tube; 8. a fixing frame.

Detailed Description

The utility model is further described with reference to specific embodiments and the accompanying drawings.

Examples

The catalytic degradation device for organic waste gas is mainly used for purifying organic waste gas and enabling the waste gas to reach the emission standard in an adsorption and catalytic degradation mode, and the specific structure and the working principle of the catalytic degradation device are described in detail below.

As shown in fig. 1 to 3, the apparatus mainly includes a case 1, a base plate 4, a filter sleeve 5, an ultraviolet lamp tube 6, and an infrared lamp tube 7. Wherein, the two sides of the box body 1 are respectively provided with an air inlet end 2 and an air outlet end 3. The base plate 4 is installed in the box 1 and is close to one side of inlet end 2, and filter sleeve 5, ultraviolet tube 6 and infrared tube 7 are all fixed mounting on base plate 4, and the wall of filter sleeve 5 coats and is stamped the catalyst and has the filtration pore that supplies waste gas to pass.

Specifically, the substrate 4 is provided with a filter sleeve mounting hole 41 for mounting the filter sleeve 5, an ultraviolet lamp 6 mounting hole 42 for mounting the ultraviolet lamp 6, and an infrared lamp 7 mounting hole 43 for mounting the infrared lamp 7. The ends of the ultraviolet light tube 6 and the infrared light tube 7 are respectively fixedly connected with the mounting holes and are sealed structures. As shown in fig. 4, the filter sleeve 5 includes a support frame 51 and an adsorption screen 52, the support frame 51 is fixedly mounted on the substrate 4, and the end portion of the support frame is fixedly connected to the filter sleeve mounting hole 41, and the adsorption screen 52 is disposed on the support frame 51 and the surface of the adsorption screen is covered with the catalyst.

When the device works, waste gas passes through the filtering sleeve 5 from the air inlet end 2 and then is discharged from the air outlet end 3, and organic matter molecules in the waste gas are adsorbed to the surface of the filtering sleeve 5. The ultraviolet light of the ultraviolet lamp tube 6 decomposes water molecules in the exhaust gas to form hydroxyl radicals with strong oxidizing property, and the hydroxyl radicals are utilized to degrade organic molecules into H₂O and CO₂On the other hand, ultraviolet light is irradiated to the surface of the catalyst to accelerate H₂The decomposition of O and the direct oxidation of organic molecules on the surface of the catalyst are also possible. The ray irradiation temperature of the infrared lamp tube 7 can reach more than 120 ℃, so that the intermediate product with higher melting point accumulated on the surface of the filtering sleeve 5 can be volatilized, and the phenomena of catalyst inactivation on the surface of the filtering sleeve 5 and filter hole blockage caused by accumulation of the intermediate product are avoided. In particular, the upper end of the box body 1 is sealed by arranging the base plate 4, so that the waste gas entering from the air inlet end 2 must enter the box body 2 from the filtering sleeve 5, and the purification effect of the waste gas is effectively improved.

It should be noted that, because the infrared lamp 7 is generally heavier and is liable to loose from the base plate 4 under long-term working conditions, the fixing frame 8 is installed on one side of the box 1 near the air outlet end 3, and one end of the infrared lamp 7 near the fixing frame 8 is installed on the fixing frame 8. In this embodiment, a groove for inserting the end of the infrared lamp 7 is formed on the fixing frame 8 for facilitating the installation of the infrared lamp 7.

In addition, in order to improve the fluidity of the exhaust gas in the device, the inlet end 2 of the present embodiment is gradually reduced along the direction from the box body 1 to the inlet, and the outlet end 3 is also gradually reduced along the direction from the box body 1 to the outlet.

In order to improve the catalytic degradation effect, the filter sleeve 5, the ultraviolet lamp 6 and the infrared lamp 7 of the present embodiment are provided in plurality and arranged alternately on the substrate 4. In order to prolong the service life of the ultraviolet lamp tube 6 and the infrared lamp tube 7, the present embodiment is covered with a protective sleeve on the outer side of the ultraviolet lamp tube 6 and the infrared lamp tube 7.

In conclusion, the catalytic degradation device for organic waste gas of the embodiment can avoid the accumulation of intermediate products on the surface of the catalyst while finishing the catalytic degradation of organic waste, and effectively improves the catalytic efficiency of the device.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims

1. The utility model provides an organic waste gas catalytic degradation device, includes box (1), inlet end (2) and end (3) of giving vent to anger are equipped with respectively to the both sides of box (1), its characterized in that: the ultraviolet lamp tube is characterized by also comprising a substrate (4), a filtering sleeve (5), an ultraviolet lamp tube (6) and an infrared lamp tube (7); the base plate (4) is arranged on one side, close to the air inlet end (2), of the box body (1), and the filtering sleeve (5), the ultraviolet lamp tube (6) and the infrared lamp tube (7) are fixedly arranged on the base plate (4); the wall surface of the filtering sleeve (5) is covered with a catalyst and is provided with filtering holes for the exhaust gas to pass through.

2. The catalytic degradation device for organic waste gas according to claim 1, wherein: the ultraviolet lamp tube and infrared lamp tube combined structure is characterized in that the substrate (4) is provided with mounting holes for mounting the filtering sleeve (5), the ultraviolet lamp tube (6) and the infrared lamp tube (7), and the end parts of the substrate (4), the filtering sleeve (5), the ultraviolet lamp tube (6) and the infrared lamp tube (7) are fixedly connected with the mounting holes.

3. The catalytic degradation device for organic exhaust gas according to claim 2, characterized in that: filter sleeve (5) including support skeleton (51) and absorption filter screen (52), support skeleton (51) fixed mounting is on base plate (4), absorb filter screen (52) and set up on support skeleton (51) and surface covering catalyst.

4. The catalytic degradation device for organic waste gas according to claim 3, characterized in that: also comprises a fixed frame (8); the fixing frame (8) is fixedly arranged on one side, close to the air outlet end (3), of the box body (1), and one end, close to the fixing frame (8), of the infrared lamp tube (7) is arranged on the fixing frame (8).

5. The catalytic degradation device for organic waste gas according to claim 4, wherein: the fixing frame (8) is provided with a groove for the end part of the infrared lamp tube (7) to extend into.

6. The catalytic degradation device for organic exhaust gas according to any one of claims 1 to 5, characterized in that: the air inlet end (2) is gradually reduced along the direction from the box body (1) to the air inlet.

7. The catalytic degradation device for organic exhaust gas according to any one of claims 1 to 5, characterized in that: the diameter of the air outlet end (3) along the direction from the box body (1) to the air outlet is gradually reduced.

8. The catalytic degradation device for organic exhaust gas according to any one of claims 1 to 5, characterized in that: the filtering sleeves (5), the ultraviolet lamp tubes (6) and the infrared lamp tubes (7) are all provided with a plurality of filtering sleeves and are arranged on the substrate (4) in a crossed mode.

9. The catalytic degradation device for organic exhaust gas according to any one of claims 1 to 5, characterized in that: the outer sides of the ultraviolet lamp tube (6) and the infrared lamp tube (7) are covered with protective sleeves.